.admin-panel{max-width:1080px;margin:0 auto;padding-bottom:40px}.admin-heading,.admin-section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap}.admin-heading{margin-bottom:24px}.admin-eyebrow{color:var(--muted);font-size:11px;letter-spacing:2px}.admin-heading h1{font-size:clamp(28px,4vw,42px);margin-bottom:12px}.admin-heading p,.admin-section-heading p,.admin-note{line-height:1.7;color:#59695e}.admin-button{min-height:44px;padding:10px 16px;border:1px solid #bdc8bb;border-radius:6px;background:var(--paper);color:var(--ink);font-size:14px;font-weight:600;flex-shrink:0}.admin-primary{background:var(--ink);border-color:var(--ink);color:var(--paper)}.admin-danger{color:#8b3025;border-color:#be8c7d}.admin-error{background:#fff0e7;border-left:3px solid #ba442d;padding:16px;margin-bottom:20px;line-height:1.7;color:#842f21}.admin-total{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:24px 0;margin-bottom:28px}.admin-total>span{display:block;font-size:15px}.admin-total strong{display:block;font-size:54px;font-weight:500;line-height:1.4}.admin-total strong small{font-size:16px}.admin-total p{color:#59695e;font-size:13px;margin:4px 0 0;line-height:1.7}.admin-card{background:var(--paper);border:1px solid var(--line);padding:24px;border-radius:8px;margin-bottom:24px}.admin-card h2{font-size:22px;margin-bottom:10px}.admin-card p{font-size:14px}.admin-new-code{background:#eaf0e5;padding:20px;border-radius:6px;margin:10px 0 20px}.admin-new-code label{display:block;font-size:14px;font-weight:700;margin-bottom:10px}.admin-new-code textarea{resize:vertical;overflow-wrap:anywhere;word-break:break-all;display:block;width:100%;min-width:0;font:16px/1.5 monospace;padding:12px;color:var(--ink);border:1px solid #aebaab;border-radius:4px;margin-bottom:12px;background:var(--paper)}.admin-new-code textarea:focus-visible{outline:3px solid #ec7449;outline-offset:4px}.admin-new-code p{margin:12px 0 0;line-height:1.7}.admin-invite-list{list-style:none;margin:0;padding:0}.admin-invite-list>li{display:flex;justify-content:space-between;gap:16px;align-items:center;border-top:1px solid var(--line);padding:18px 0}.admin-invite-info{display:flex;gap:7px;align-items:flex-start;flex-direction:column;font-size:13px;min-width:0;overflow-wrap:anywhere}.admin-invite-info small{color:#657366}.admin-badge{font-size:12px;padding:4px 9px;border-radius:20px;background:#efede5}.admin-badge-unused{color:#325b3c;background:#e4eddf}.admin-badge-used{color:#576554}.admin-badge-revoked{color:#795249;background:#f5e7df}.admin-revoke-confirm{max-width:280px}.admin-revoke-confirm p{line-height:1.6}.admin-revoke-confirm>div{display:flex;gap:8px;flex-wrap:wrap}.admin-member{padding:20px 0;border-top:1px solid var(--line)}.admin-member-name h3{font-size:18px;margin-bottom:6px}.admin-member-name p{overflow-wrap:anywhere;margin-bottom:16px}.admin-member dl{display:grid;grid-template-columns:1fr 1fr 100px;gap:20px;margin:0}.admin-member dt{font-size:12px;color:#657366;margin-bottom:7px}.admin-member dd{font-size:14px;margin:0;line-height:1.6}.admin-empty{padding:20px 0 0;color:#657366;line-height:1.7}.admin-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:600px){.admin-card{padding:18px}.admin-heading{gap:8px}.admin-section-heading>.admin-button{width:100%;margin-bottom:18px}.admin-invite-list>li{align-items:flex-start;flex-wrap:wrap}.admin-invite-info{flex:1 1 180px}.admin-revoke-confirm{max-width:none;width:100%}.admin-member dl{grid-template-columns:1fr;gap:12px}.admin-member dl>div{display:grid;grid-template-columns:80px 1fr;gap:10px}.admin-member dt{margin:0;line-height:1.8}}.admin-courses{margin-top:32px;min-width:0}.admin-courses-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.admin-courses-heading h2{margin:0}.admin-courses-heading p{color:#666b60;line-height:1.6}.admin-course-filters{display:flex;flex-wrap:wrap;align-items:end;gap:16px;margin:20px 0 12px}.admin-course-filters label{display:grid;gap:8px;min-width:180px;font-weight:600}.admin-course-filters select{width:100%;min-height:48px;border:1px solid #b9c4b7;border-radius:10px;background:#fffdf7;color:#283d31;padding:10px 32px 10px 12px;font:inherit;font-size:16px}.admin-course-count,.admin-course-meta,.admin-course-totals{color:#626c60;font-size:.9rem}.admin-course-list{display:grid;gap:16px}.admin-course{background:#fffdf7;border:1px solid #d7dccc;border-radius:16px;overflow:hidden}.admin-course>summary{padding:20px;cursor:pointer;min-height:48px}.admin-course-summary{display:inline-flex;flex-direction:column;gap:8px;width:calc(100% - 24px);vertical-align:top;overflow-wrap:anywhere}.admin-course-title{font-size:1.25rem;font-weight:700;color:#263f30}.admin-course-tags{display:flex;flex-wrap:wrap;gap:6px}.admin-course-tags>span,.admin-course-kind{background:#edf1e7;border-radius:6px;color:#3e553c;padding:4px 8px;font-size:.8rem}.admin-course-content{padding:0 20px 20px;overflow-wrap:anywhere;line-height:1.65}.admin-course-content>a{display:inline-block;padding:10px 0;color:#2f6545;text-decoration:underline;text-underline-offset:4px}.admin-course-section{border-top:1px solid #e0e4d9;margin-top:16px}.admin-course-section>summary{cursor:pointer;padding:16px 4px;min-height:48px;font-weight:700}.admin-course-section>summary>span{margin-left:8px;color:#65735d;font-weight:400}.admin-course-items{padding-left:26px;margin:0}.admin-course-items>li{padding:18px 0;border-bottom:1px solid #e5e8de}.admin-course-items>li:last-child{border-bottom:0}.admin-course-items h4{font-size:1.05rem;margin:8px 0;line-height:1.6}.admin-course-items p{margin:8px 0}.admin-course-example,.admin-course-answer{padding:10px 16px;background:#f2f4ec;border-radius:10px;margin-top:12px}.admin-course-label{color:#63715b;font-size:.9rem}.admin-course-options{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}.admin-course-options li{padding:5px 10px;background:#f6f0e5;border-radius:6px}.admin-courses summary:focus-visible,.admin-course-filters select:focus-visible,.admin-courses a:focus-visible{outline:3px solid #bf742b;outline-offset:3px}@media(max-width:600px){.admin-courses-heading{align-items:start;flex-direction:column}.admin-course-filters{flex-direction:column;align-items:stretch;gap:12px}.admin-course-filters label{min-width:0}.admin-course>summary{padding:16px}.admin-course-content{padding:0 16px 16px}.admin-course-example,.admin-course-answer{padding:8px 12px}}.course-filters{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;border-top:1px solid var(--line);padding-top:24px}.course-filters label{display:flex;flex:1 1 180px;flex-direction:column;gap:9px;font-size:14px;font-weight:600}.course-filters select{max-width:100%;min-height:46px;padding:10px 12px;font:inherit;background:var(--paper);border:1px solid #b9c2b6;color:var(--ink);border-radius:5px}.course-filters select:focus-visible{outline:3px solid var(--orange);outline-offset:3px}.course-clear,.course-secondary{min-height:46px;padding:10px 16px;border:1px solid #b9c2b6;border-radius:5px;background:var(--paper);color:var(--ink);font-size:14px}.course-result-count{font-size:13px;color:#5f6e63;margin:20px 0}.course-library{display:grid;gap:24px}.library-course .course-art{min-width:0;overflow:hidden}.library-course .course-art b{font-size:clamp(26px,3.5vw,44px);line-height:1.45;overflow-wrap:anywhere}.library-course .course-art>span{font-size:13px;letter-spacing:1px}.course-tags{list-style:none;display:flex;flex-wrap:wrap;gap:7px;margin:0 0 18px;padding:0}.course-tags li{background:#eaf0e4;color:#435c45;padding:5px 9px;border-radius:4px;font-size:12px}.course-current{display:inline-block;font-size:12px;margin:6px 0 6px 10px;color:#435c45}.course-actions{display:flex;flex-wrap:wrap;gap:12px}.course-no-results{padding:32px 20px;background:var(--paper);line-height:1.7;border:1px solid var(--line)}@media(max-width:600px){.course-filters{gap:12px}.course-filters label{flex-basis:100%}.course-actions{flex-direction:column}.course-actions button{width:100%}.library-course .course-art{min-height:170px}.library-course .course-art b{font-size:30px}}:root{font-family:PingFang TC,Noto Sans TC,Microsoft JhengHei,sans-serif;color:#203d34;background:#f6f4ec;font-synthesis:none;--ink: #203d34;--muted: #748077;--orange: #ec7449;--line: #dedfd3;--paper: #fffcf5}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #ec7449;outline-offset:4px}button{transition:background .15s,transform .15s}a{color:inherit}h1,h2,h3,p{margin-top:0}button:hover:not(:disabled){transform:translateY(-1px)}.app-shell{max-width:1600px;margin:auto;display:grid;grid-template-columns:245px 1fr;min-height:100vh}.sidebar{border-right:1px solid var(--line);padding:40px 24px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{text-decoration:none;display:flex;gap:12px;align-items:center;font-size:13px;font-weight:700;letter-spacing:1.4px}.brand small{display:block;margin-top:7px;font-size:10px;font-weight:400;letter-spacing:2px}.brand-mark{background:var(--ink);color:var(--paper);width:42px;height:46px;display:grid;place-items:center;font:italic 35px Georgia,serif;border-radius:2px}.rail-label{margin:60px 12px 15px;font-size:8px;letter-spacing:1.9px;color:var(--muted)}.nav-item{display:flex;align-items:center;gap:13px;width:100%;padding:16px 13px;margin-bottom:5px;border:0;background:transparent;color:var(--muted);text-align:left;font-size:13px;border-radius:4px}.nav-item>span{font-size:21px;line-height:1}.nav-item.active{background:#e4e9df;color:var(--ink);font-weight:600}.nav-item b{margin-left:auto;background:var(--orange);color:#fff;border-radius:50%;min-width:20px;padding:3px;font-size:10px;text-align:center}.rail-note{margin-top:auto;padding:35px 12px}.tiny-star{color:var(--orange);font-size:39px}.rail-note p{font:22px/1.35 Georgia,serif;margin:16px 0}.rail-note small{font-size:10px;color:var(--muted)}.account{border-top:1px solid var(--line);padding:23px 7px 0;display:flex;gap:12px;align-items:center}.avatar{height:35px;width:35px;background:#e3e3d3;border-radius:50%;display:grid;place-items:center}.account strong{font-size:12px}.account button{border:0;background:none;color:var(--muted);font-size:10px;display:block;margin-top:5px;padding:0}main{padding:0 55px;min-width:0}.topbar{height:89px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:1.8px}.date{color:var(--muted);letter-spacing:.7px}.date i{font-style:normal;color:var(--orange);font-size:7px;padding:0 8px}.page-heading{padding:47px 0 31px}.eyebrow{font-size:9px;font-weight:600;letter-spacing:2px}.page-heading h1{font-size:35px;line-height:1.5;letter-spacing:1px;margin:12px 0 9px;font-weight:500}.page-heading h1 em{font-style:normal;color:#72866b}.page-heading p{color:var(--muted);font-size:12px;margin:0;line-height:1.8}.today-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}.hero-card{background:var(--ink);color:var(--paper);padding:27px 30px 29px;position:relative;overflow:hidden;min-height:337px;border-radius:5px}.hero-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:34px;font-size:9px;letter-spacing:2px;color:#b9c6b6}.pill{font-size:9px;letter-spacing:1px;padding:7px 10px;display:inline-block;border:1px solid #ced5c7;border-radius:3px}.pill.light{border-color:#64796b}.hero-card>.eyebrow{color:#b0c1ac}.hero-card h2{font:46px/1.07 Georgia,Times New Roman,serif;letter-spacing:-1px;margin:13px 0}.hero-card h2 em{color:#efb786;font-weight:400}.hero-card>p{color:#d4dccb;font-size:12px}.hero-bottom{display:flex;align-items:center;gap:17px;margin-top:25px;position:relative;z-index:1}.hero-bottom>span{font-size:10px;color:#bac8b6}.hero-decoration{position:absolute;font-size:220px;right:-60px;bottom:12px;color:#365345;line-height:1;transform:rotate(14deg);pointer-events:none}.primary{background:var(--orange);color:#fffaf0;border:1px solid var(--orange);padding:14px 20px;border-radius:3px;font-size:12px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:28px;min-height:46px}.primary:hover:not(:disabled){background:#da633a}.side-cards{display:flex;flex-direction:column;gap:18px}.stat-card{padding:25px 25px 20px;border:1px solid var(--line);background:var(--paper);border-radius:5px}.stat-card>.eyebrow{color:var(--muted)}.stats{display:flex;justify-content:space-between;margin:21px 0 23px}.stats strong{font:37px Georgia,serif;display:block}.stats span{font-size:10px;color:var(--muted);display:block;margin-top:5px}.rule{border-top:1px solid var(--line)}.stat-card p{font-size:10px;margin:13px 0 0;color:var(--muted)}.review-note{display:flex;gap:16px;background:#eaece0;padding:20px;border-radius:4px;flex:1}.review-note>span{font-size:28px;color:#75846a}.review-note h3{font-size:13px;margin:1px 0 8px;font-weight:500}.review-note p{font-size:11px;line-height:1.8;color:#687463;margin:0}.section-heading{display:flex;justify-content:space-between;align-items:center;margin:35px 0 17px}.section-heading h2{font-size:15px;font-weight:500;margin:0}.section-heading>span{font-size:8px;letter-spacing:1.5px;color:var(--muted)}.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.method-card{border-top:1px solid #b6bfb0;padding:19px 0}.method-number{font:italic 18px Georgia,serif;color:var(--orange)}.method-card h3{font:22px Georgia,serif;margin:15px 0 10px}.method-card strong{font-size:11px;font-weight:500}.method-card p{font-size:10px;line-height:1.8;color:var(--muted);margin:8px 0}footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:40px;padding:21px 0 25px;color:var(--muted);font-size:8px;letter-spacing:1.3px}footer p{font:italic 12px Georgia,serif;margin:0}.auth-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:50px;padding:55px 0 20px}.auth-story h1{font:52px/1.13 Georgia,serif;letter-spacing:-1.5px;margin:22px 0}.auth-story h1 em{color:#6d8669}.auth-story>p{font-size:15px;color:var(--muted);line-height:1.9}.auth-art{height:230px;position:relative;padding:25px 20px}.paper-card{transform:rotate(-6deg);background:#e8e9da;border:1px solid #d4d8c5;width:260px;padding:23px;box-shadow:7px 10px #e1dfd4}.paper-card>span{font-size:9px;letter-spacing:2px}.paper-card p{font:28px/1.1 Georgia,serif;margin:27px 0 21px}.paper-card i{font:14px Georgia,serif;color:#748568}.sunburst{position:absolute;color:var(--orange);font-size:96px;right:1px;bottom:13px}.small-note{font-size:10px;color:var(--muted);margin-top:18px;letter-spacing:2px}.auth-form{background:var(--paper);border:1px solid var(--line);padding:32px;border-radius:4px;align-self:start}.auth-form h2{font-size:23px;font-weight:500;margin:18px 0 12px}.auth-form>p{font-size:11px;color:var(--muted);line-height:1.8}.segmented{display:flex;background:#f0f0e7;padding:4px;gap:4px;margin:24px 0}.segmented button{flex:1;background:none;border:0;font-size:12px;color:var(--muted);padding:11px}.segmented button.selected{background:var(--paper);color:var(--ink);box-shadow:0 1px 3px #0001}.auth-form label{display:block;font-size:11px;margin:17px 0}.auth-form input{display:block;width:100%;border:1px solid var(--line);background:transparent;padding:13px 12px;font-size:12px;margin-top:8px;border-radius:3px;color:var(--ink)}.auth-form input::placeholder{color:#9a9f93}.full{width:100%;margin-top:6px}.form-note{display:block;font-size:9px;line-height:1.9;color:var(--muted);margin-top:17px}.alert{padding:15px 18px;background:#fff0e3;border:1px solid #e6ba9b;color:#92441e;font-size:12px;line-height:1.7;margin-top:18px;border-radius:3px}.alert button{border:0;background:none;color:inherit;text-decoration:underline;margin-left:12px}.course-card{display:grid;grid-template-columns:230px 1fr;gap:35px;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:4px}.course-art{background:#e7e9db;position:relative;overflow:hidden;min-height:270px;padding:22px}.course-art>span{font:italic 23px Georgia,serif;color:#7a8c6d}.course-art b{display:block;font:45px/1 Georgia,serif;margin-top:42px}.course-art i{position:absolute;font-size:110px;right:-26px;bottom:-20px;color:var(--orange);font-style:normal}.course-details h2{font:30px/1.2 Georgia,serif;margin:22px 0 11px}.course-details h3{font-size:14px;font-weight:500}.course-details p{font-size:12px;color:var(--muted);line-height:1.8}.course-counts{font-size:10px;color:var(--muted);margin:20px 0}.source-note{font-size:9px!important;margin:17px 0 0}.compact{padding-bottom:22px}.practice-area{max-width:720px;margin:auto}.practice-meta{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);letter-spacing:1px}.progress-track{height:3px;background:#e1e3d8;margin:13px 0 24px}.progress-track>div{height:100%;background:var(--orange);transition:width .3s}.exercise-card{padding:38px;background:var(--paper);border:1px solid var(--line);border-radius:5px;min-height:360px;text-align:center}.exercise-card h2{font:30px/1.35 Georgia,serif;margin:24px 0 12px;white-space:pre-line}.exercise-card h2.vocabulary-word{font-size:48px}.exercise-card>p{font-size:13px;color:var(--muted);line-height:1.8}.prompt-note{font-size:11px!important}.reveal-button{border:1px dashed #a9b79d;background:#eff1e5;color:var(--ink);padding:25px;width:100%;margin:30px 0 15px;border-radius:4px;font-size:13px}.answer-panel{background:#ecf0e4;border-left:3px solid #8c9f7e;padding:22px;text-align:left;margin:25px 0;font-size:12px;line-height:1.8}.answer-panel h3{font-size:20px;margin-bottom:14px}.answer-panel p{margin:8px 0}.answer-panel .english{font:21px/1.5 Georgia,serif}.answer-panel small,.hint small{font-size:9px;letter-spacing:1px;color:var(--muted)}.exercise-actions{margin-top:28px}.exercise-actions>p{font-size:12px;color:var(--muted)}.rating-buttons{display:flex;justify-content:center;gap:12px}.secondary{border:1px solid #bcc5b1;background:none;color:var(--ink);padding:14px 18px;border-radius:3px;font-size:12px;min-height:46px}.save-note{font-size:10px;color:#6b805d;margin-bottom:17px}.choices{display:grid;gap:10px;text-align:left;margin:25px 0}.choices button{padding:15px;border:1px solid var(--line);background:none;text-align:left;color:var(--ink);border-radius:3px;font-size:13px}.choices button>span{display:inline-grid;place-items:center;width:25px;height:25px;border:1px solid var(--line);margin-right:14px;font:12px Georgia,serif}.choices button.chosen{border-color:var(--orange);background:#fff0e4}.choices button.correct{border-color:#839b70;background:#e8efdf;opacity:1}.sentence-line{min-height:100px;border-bottom:1px solid #afba9f;border-top:1px solid var(--line);padding:20px 0;margin:28px 0 17px;text-align:left;display:flex;flex-wrap:wrap;gap:8px;align-items:center}.sentence-line>span{font-size:11px;color:#9aa08f}.sentence-line button,.word-bank button{padding:10px 14px;border:1px solid #ccd4bd;background:#edf0e3;border-radius:3px;color:var(--ink);font:17px Georgia,serif;min-height:44px}.sentence-line small{font-size:12px;color:var(--muted)}.word-bank{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.word-bank button{background:var(--paper)}.word-bank button:disabled{opacity:.24}.hint{text-align:left;background:#f3eee1;padding:18px 22px;margin:25px 0}.hint p{font:19px/1.6 Georgia,serif;margin:8px 0 0}.session-footnote{text-align:center;font-size:10px;color:var(--muted);line-height:1.8;margin:19px 0}.empty-state{text-align:center;border:1px solid var(--line);background:var(--paper);padding:50px 30px;border-radius:5px}.empty-state>span{display:block;font-size:60px;color:var(--orange);margin-bottom:20px}.empty-state h2{font-size:25px;font-weight:500;margin:23px 0 15px}.empty-state p{font-size:12px;color:var(--muted);line-height:1.9;max-width:430px;margin:15px auto 25px}.text-button{display:block;background:none;border:0;color:var(--muted);font-size:12px;margin:20px auto 0;text-decoration:underline}.history-summary{display:grid;grid-template-columns:repeat(3,1fr);background:var(--ink);color:var(--paper);padding:28px;border-radius:4px;gap:20px}.history-summary>div{padding:5px 20px;border-right:1px solid #526857}.history-summary>div:last-child{border:0}.history-summary strong{display:block;font:42px Georgia,serif;margin-bottom:8px}.history-summary span{font-size:11px;color:#c0cbb8}.history-row{display:flex;align-items:center;gap:15px;padding:20px 0;border-bottom:1px solid var(--line)}.history-dot{display:grid;place-items:center;background:#f0dec9;color:#a75b2a;width:32px;height:32px;border-radius:50%;flex-shrink:0}.history-dot.good{background:#e1e8d9;color:#627c52}.history-row>div:nth-child(2){flex:1;min-width:0}.history-row strong{font:17px Georgia,serif;display:block;line-height:1.5}.history-row small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.history-time{font-size:10px;text-align:right;flex-shrink:0}.history-time time{display:block;color:var(--muted);font-size:9px;margin-top:6px}.empty-state.small{padding:30px}.mobile-nav{display:none}.loading{min-height:100vh;display:flex;align-items:center;justify-content:center;gap:18px;color:var(--muted);font-size:13px}@media(min-width:1350px){main{padding:0 80px}.hero-card h2{font-size:56px}.hero-card{padding:30px 38px}.hero-bottom{margin-top:35px}.today-grid{grid-template-columns:1.5fr 1fr}.auth-story h1{font-size:65px}.auth-art{max-width:380px}}@media(max-width:1050px){.app-shell{grid-template-columns:200px 1fr}.sidebar{padding:32px 17px}.brand{font-size:11px}.brand small{font-size:8px}.brand-mark{width:35px;height:40px}main{padding:0 30px}.today-grid{grid-template-columns:1fr}.side-cards{display:grid;grid-template-columns:1.1fr 1fr}.hero-card{min-height:330px}.auth-layout{gap:24px}.auth-story h1{font-size:42px}.auth-form{padding:23px}.paper-card{width:210px}.sunburst{font-size:80px}.course-card{grid-template-columns:190px 1fr;gap:22px}.method-card h3{font-size:20px}}@media(max-width:720px){.app-shell{display:block}.sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:19px 22px;flex-direction:row;align-items:center;justify-content:space-between}.sidebar nav,.rail-label,.rail-note{display:none}.brand{font-size:11px}.brand-mark{width:33px;height:37px;font-size:30px}.brand small{font-size:8px;margin-top:4px}.account{border:0;padding:0;gap:8px}.avatar{height:30px;width:30px;font-size:12px}.account strong{font-size:10px}.account button{font-size:9px}main{padding:0 22px 65px}.topbar{height:52px;font-size:7px;letter-spacing:1px}.date{font-size:8px;letter-spacing:0}.date i{padding:0 4px}.page-heading{padding:30px 0 25px}.eyebrow{font-size:8px;letter-spacing:1.7px}.page-heading h1{font-size:27px;letter-spacing:0;margin:13px 0 8px}.page-heading p{font-size:11px}.hero-card{padding:23px;min-height:330px}.hero-top{margin-bottom:34px}.hero-card h2{font-size:48px}.hero-bottom{gap:12px;flex-wrap:wrap;margin-top:28px}.hero-bottom>span{font-size:9px}.hero-decoration{font-size:180px;right:-62px}.primary{font-size:12px;padding:13px 17px;gap:20px}.side-cards{display:flex;gap:14px}.stat-card{padding:22px}.stats{margin:19px 0}.stats strong{font-size:34px}.review-note{padding:19px}.section-heading{margin:30px 0 17px;gap:10px}.section-heading h2{font-size:13px}.section-heading>span{font-size:7px;letter-spacing:.8px}.method-grid{gap:16px;grid-template-columns:1fr}.method-card{display:grid;grid-template-columns:35px 1fr;column-gap:13px;padding:16px 0}.method-number{grid-row:span 3;margin-top:4px}.method-card h3{margin:0 0 8px;font-size:22px}.method-card p{margin:5px 0 0}.method-card strong,.method-card p{grid-column:2}footer{margin-top:30px;padding:20px 0;font-size:7px;letter-spacing:.5px}footer p{font-size:11px}.mobile-nav{position:fixed;bottom:0;left:0;right:0;background:#f9f8f0f5;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);padding:9px 8px max(10px,env(safe-area-inset-bottom));z-index:5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.mobile-nav button{background:none;border:0;color:#899280;font-size:9px;display:flex;flex-direction:column;align-items:center;gap:5px;padding:2px}.mobile-nav button>span{font-size:21px;height:25px}.mobile-nav button.active{color:var(--ink);font-weight:600}.mobile-nav button.active>span{color:var(--orange)}.auth-layout{grid-template-columns:1fr;padding:35px 0;gap:25px}.auth-story h1{font-size:45px;margin:20px 0}.auth-story>p{font-size:13px}.auth-art,.small-note{display:none}.auth-form{padding:25px}.course-card{grid-template-columns:1fr;padding:20px;gap:25px}.course-art{min-height:185px}.course-art b{font-size:38px;margin-top:21px}.course-art i{font-size:160px;right:10px;bottom:-35px}.course-details h2{font-size:28px}.compact{padding-bottom:19px}.practice-meta{font-size:9px}.exercise-card{padding:26px 20px}.exercise-card h2{font-size:25px;margin-top:22px}.exercise-card h2.vocabulary-word{font-size:39px}.exercise-card>p{font-size:12px}.rating-buttons{flex-direction:column}.answer-panel{padding:18px;font-size:11px}.answer-panel .english{font-size:19px}.choices button{font-size:12px;padding:12px}.choices button>span{margin-right:10px}.history-summary{padding:20px 10px;gap:0}.history-summary>div{padding:0 10px}.history-summary strong{font-size:32px}.history-summary span{font-size:9px}.history-row{gap:10px}.history-row strong{font-size:15px}.history-dot{width:27px;height:27px;font-size:12px}.history-time{font-size:9px}.history-time time{font-size:8px}.history-row small{font-size:9px}.empty-state{padding:35px 20px}.empty-state h2{font-size:21px}.empty-state p,.alert{font-size:11px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}.primary{color:#203d34;font-weight:700}.auth-form input{font-size:16px}.auth-form label,.auth-form>p,.form-note,.exercise-card>p,.answer-panel,.save-note,.session-footnote,.empty-state p,.course-details>p,.review-note p,.history-row small{font-size:14px;line-height:1.8}.prompt-note{font-size:14px!important}.primary,.secondary,.choices button{min-height:48px;font-size:15px}.wordbook-note{color:var(--muted);font-size:14px;line-height:1.8}.wordbook-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.wordbook-card{background:var(--paper);border:1px solid var(--line);padding:18px;display:flex;flex-direction:column;gap:8px}.wordbook-card strong{font:22px Georgia,serif}.wordbook-card span{font-size:14px}.wordbook-card small{color:var(--ink);font-size:12px}.wordbook-card time{color:#606d63;font-size:12px}@media(max-width:700px){.wordbook-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.wordbook-card{padding:14px}.wordbook-card strong{font-size:20px}.history-time time{font-size:11px}.history-summary span{font-size:12px}}@media(max-width:370px){.wordbook-grid{grid-template-columns:1fr}}.password-field{display:grid;gap:8px}.password-input{position:relative}.auth-form .password-input input{padding-right:72px;width:100%}.password-input button{position:absolute;right:4px;top:50%;transform:translateY(-50%);min-width:60px;min-height:44px;border:0;border-radius:8px;background:transparent;color:var(--green, #244b3d);font:inherit;cursor:pointer}.password-input button:focus-visible{outline:2px solid #244b3d;outline-offset:-2px}.field-error{margin:0;color:#a33026;font-size:14px}.auth-form input[aria-invalid=true]{border-color:#a33026}.auth-form .auth-alert{margin:0}:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Noto Sans TC,Microsoft JhengHei,sans-serif;--muted: #596b61}body{font-size:16px;line-height:1.65;-webkit-text-size-adjust:100%}button,input,select{touch-action:manipulation}input,select,textarea{font-size:16px}.page-heading p,.exercise-card>p,.answer-panel,.course-details>p,.review-note p{font-size:16px;line-height:1.8}.eyebrow,.practice-meta,.session-footnote,.save-note,.answer-panel small,.hint small{font-size:13px;line-height:1.6}.exercise-card h2{font-size:clamp(25px,4vw,32px);line-height:1.5;overflow-wrap:anywhere}.exercise-card h2.vocabulary-word{font-size:clamp(36px,8vw,48px)}.answer-panel h3{font-size:22px;line-height:1.5}.answer-panel .english,.answer-english{font-size:22px;line-height:1.65}.hint p{font-family:inherit;font-size:16px;line-height:1.8}.prompt-note{font-size:15px!important}.reveal-button,.rating-buttons button,.choices button{min-height:52px;font-size:16px}.sentence-line button,.word-bank button{min-height:48px;font-size:19px;padding:10px 15px}.word-bank button:disabled{opacity:.45}.course-filters select,.admin-course-filters select{min-height:48px;font-size:16px}.admin-course-content,.admin-course-items,.admin-course-content p{font-size:16px;line-height:1.8}.admin-course-section summary,.admin-course>summary{min-height:48px}.practice-area{scroll-margin-top:20px}@media(hover:none){button:hover{transform:none}.password-input button:hover{transform:translateY(-50%)}button:active:not(:disabled):not(.password-input button){transform:scale(.98)}}@media(max-width:720px){main{padding-bottom:calc(115px + env(safe-area-inset-bottom))}.page-heading h1{font-size:29px;line-height:1.35}.page-heading p{font-size:15px}.exercise-card{padding:24px 18px}.practice-meta{font-size:12px;letter-spacing:.3px}.answer-panel{padding:18px;margin:20px 0}.exercise-actions{margin-top:22px}.exercise-actions>p{font-size:15px}.rating-buttons{gap:10px}.mobile-nav button{min-height:52px;font-size:11px;padding:4px 1px;gap:2px;line-height:1.4}.mobile-nav{padding-top:7px}.account strong{font-size:12px}.account button{min-height:44px;font-size:13px;padding:6px 10px}.hero-card h2{font-size:clamp(34px,10vw,48px);line-height:1.15;overflow-wrap:anywhere}.course-filters{gap:12px}.sentence-line{margin-top:20px}}@media(prefers-reduced-motion:reduce){button{transition:none}}.course-filters label,.admin-course-filters label{font-size:14px}.course-clear{min-height:44px;font-size:14px}